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The ancestors of dinosaurs are bacteria. they would split and reproduce by itself and creating multiple cells until you had a larvae like dinosaur.

Other scientists say either they started as the "Big bang" or molecular forms that grew.

so technically there are no ancestors of dinosaurs only decendants

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12y ago
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14y ago

The mammal-like reptiles

No, the dinosaurs ancestors were the Dinosauriformes.

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13y ago
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